How to Prevent Cone Crusher from Packing with Wet Ore
For cone crusher operators in Indonesia and Brazil, wet ore – whether from tropical rains or naturally high moisture – is a common cause of “packing” (material buildup and compaction inside the crushing chamber). Packing reduces throughput, increases liner wear, and can damage the crusher if not addressed quickly. Knowing how to prevent cone crusher from packing with wet ore helps you maintain stable production during rainy seasons or when processing clay‑bound material. Below we explain practical measures based on OCP Mechanical Company’s 40 years of experience, with factory‑direct support and 24/7 online assistance.
1. Pre‑Screen Fines and Moisture
The first step in how to prevent cone crusher from packing with wet ore is to remove fine material that tends to stick. Wet fines (below 6‑10 mm) are the primary cause of packing because they adhere to the liners and each other. Install a vibrating screen ahead of the cone crusher to scalp out material below the closed side setting (CSS). For a 150‑200 tph line, a double‑deck screen with 8‑12 mm apertures can effectively remove sticky fines. Additionally, if the ore is extremely wet (>8% moisture), use a dewatering screen or allow stockpiles to drain for 24‑48 hours before crushing. Note: Product data are constantly updated; for the latest screen and feeder specifications, please contact our online customer service.
Many mines in the Carajás region (Brazil) have reduced cone crusher packing by 70% after installing a scalping screen ahead of the crusher during the wet season.
2. Adjust CSS and Maintain Choke‑Fed Condition
A key preventive measure in how to prevent cone crusher from packing with wet ore is setting the CSS slightly wider than for dry ore. A tighter CSS compresses wet material, promoting packing. Widen the CSS by 2‑4 mm (e.g., from 12 mm to 15 mm) and observe product size. Also, maintain a choke‑fed condition – a full crushing chamber actually reduces packing because the material bed helps push wet fines through. A starved crusher allows fine wet material to accumulate on the liners. Use a level sensor to automatically adjust feed rate.
All performance data in this article are for reference only; contact our team for a site‑specific tuning recommendation.
Producers in West Java have avoided packing by increasing CSS by 3 mm and keeping the crusher choke‑fed, with only a minor reduction in product fineness.
3. Use Water Sprays or Dry Feed Additives
Another practical method in how to prevent cone crusher from packing with wet ore is to modify the material’s surface properties. Low‑pressure water sprays (1‑2 bar) directed at the crusher feed can help reduce adhesion by keeping fines slightly lubricated, but this is counter‑intuitive because water already causes packing. Instead, consider adding a dry free‑flowing material (e.g., dry sand or lime) to the wet feed to absorb moisture and reduce stickiness. For every 10% of dry material added, moisture content can drop by 1‑2 percentage points. This technique is widely used in Brazilian iron ore operations.
If packing has already occurred, stop the feed, open the CSS fully, and run the crusher empty for 2‑3 minutes to discharge the packed material. Do not use water to flush packing – it will worsen the situation.
4. Select a Cavity Profile with a Steeper Design
Not all cone crusher cavities are equal for wet ore. A short‑head cavity with a steep angle and a short parallel zone is less prone to packing than a standard cavity because material flows more freely. Some manufacturers offer “wet ore” or “anti‑packing” chamber profiles. OCP’s Type C cone crusher can be supplied with an optional steep‑angle cavity for sticky applications. Ask our engineers for details.
Why OCP Is Your Partner for Wet Ore Crushing
Understanding how to prevent cone crusher from packing with wet ore helps you keep your plant running efficiently. OCP Mechanical Company has over 40 years of history in cone crusher engineering. We offer:
Free pre‑sale material testing to recommend the optimal cavity and CSS for wet conditions.
Factory‑direct wet‑ore crushers with optional steep cavities and automatic pressure relief.
Local spare parts stock in Indonesia and Brazil for fast delivery.
24/7 online technical support for remote troubleshooting.
For a no‑obligation consultation and personalized advice on how to prevent cone crusher from packing with wet ore, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to answer your technical questions, provide free recommendations, and help you adapt your crushing circuit for wet ore conditions.
